Antiskidding tread device for yielding tires.



G. J. ADAM. DECD.

R. s. ADAM. ADMINISTRATOR. I ANTISKIDDING TREAD DEVICE FOR YIELDING TIRES.

APPLICATION FILED JUNE l5, l9l4- Patented Apr. 9, 1918.

GEORGE J. ADAM, DECEASED, BY It. STUART ADAM, ADMINISTRATOR, OF CHICAGO,

ILLINOIS. 1

Specification of Letters Patent.

Patented Apr. 9, 1918.

Application filed. June 15, 1914. Serial No. 845,166.

To all whom it may concern:

Be it known that I, GEORGE J. ADAM,'deceased, here appearing by administrator, R. STUART ADAM, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Antiskidding Tread Devices for Yielding Tires; and I, by said administrator, do hereby declare that the followingis a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in antiskidding tread devices for yielding tires, such as pneumatic or cushion tires of soft rubber, and particularly to improvements in that type of such devices in which tough, non-metallic, flexible, compressible pads, such, for example, as leather or rubber pads, are provided for inducing friction between the tire and the surface with which it comes in contact. The object of my invention is to provide a novel construction of attaching means for the pads which is simple, economical, and at the same time highly eflicient, and which permits the ready detachment of the pads singly, for the purpose of replacing them when they become old or worn out. The construction of attaching means to which the present invention relates is of the same general type as that disclosed in Letters Patent granted to me January 9th, 1912, No. 1,014,358, and in a prior application of mine filed February 23rd, 1911, Serial No. 610,216.

My invention also relates to a novel pad of the kind described, which, by reason of its form, combines a maximum of efliciency with a minimum of expense of manufacture.

The invention consists of the matters hereinafter described and more particularly pointed out in the appended claims.

In the accompanying drawings illustrating my invention:

Figure 1 is a top plan view of a pad provided with my improved attaching 'means at each end thereof.

Fig. 2 is a view representing a partial lon- 'tudinal section in a plane indicated by the line 2-2 of Fig. 1.

Fig. 3 is a view representing a transverse section in a plane indicated by the line 33 of Fig. 1.

Fig. 4 is a top plan view showing my improved form of pad with the attaching means secured to one end thereof.

Figs. 5 and 6 are perspective views of the several parts of the attaching means to be hereafter more particularly referred to.

Fig. is a view representing the link in side elevation and one of the parts of the attaching means in section, the former being shown in one of the positions during the process of attaching the same to the latter.

Referring now to that embodiment of my invention illustrated in the drawings, 12 indicates a pad, made of leather, hard, tough rubber, or other suitable non-metallic, tough, flexible material which tends to induce friction. The pad so far as the attaching means is concerned may be made of any form adapted for use in an anti-skidding tread device of the type described, and, as

shown in Fig. 1, is in the form of a single straight, narrow strip. In Fig. 4 I have shown my improved form of pad but this will be described later as I shall first refer simply to the attaching means. The lateral edges of the pad adjacent its ends 14, 14, are provided with oppositely disposed, longitudinally spaced, pairs of notches 13 13 13 13*, within which the attaching devices are adapted to engage, as will presently appear. The parts 13, 13 of said lateral edges intermediate the said notches are curved in the arc of a circle.

The pad 12 is provided with attaching means at each end. Said attaching means, in each instance, comprises a flanged lower plate 15 having abase 15*, which lies beneath the end of the pad, and which is provided with oppositely disposed, upright lateral flanges 16, 16, adapted for engagement with the arcuate parts 13, 13 of the lateral edges of the pad with their ends extending into the notches 13 13 13",13", at the ends of said arcuate parts; and an upper plate 17 which rests on the top surface of the pad above the lower plate 15 and is engaged by the upper marginal parts 16*, 16 of the upright flanges 16, 16, which are bent inwardly and downwardly upon the same, as

best shown in Fig. 3. By this construction, the upper ,and lower plates arerigidly secured'to the pad. In Fig. 1 the right hand end of the pad shows the upper and lower plates as they appeanbefore,the upper marginal parts of the lateral flanges of the lower plate have been bent downwardly.

The base 15 of the lower plate 15 is provided with an extension 18,-having an aperture 18 adapted to be engaged by the hook offa link,19, Asshown, saideXtension 18 is inclined downwardly at an angle to the base 15 so that; thesame will lie in contact withfthe. surface ofthe tire to whichmydevice is applied. On the upper surface of said extension 18 and surrounding the aperture 18 is an'annular rib 18 having laterally disposed groove 18 As illustrated in the drawings, said rib 1,8 is preferably formed by pressing or stamping upwardly the ni'et'al'of the extension. M

The link; 1 9- has two hooks 193 1151", the former adapted, to-be engaged within the aperture 18 in the extension 18 and the latter adapted/to be engagedv by the chains appliedjto the-tire and comprising the means ioriietainihg the pads in'position on: the tread in a familiar nanner. The-end 19 of the hook 19 is not closed againstthe body of the link 19 but'is spaced fron the shankof the said link; to allow the relatively thin part of the extension at the groove 18 to pass between the same, when the link isbroilght into a position shown in Fig. 7 with its shank in the lateral groove 18 and diametrically'disposed with "respect tog-the aperture 18?. In this position of the link th e hook 19v is capable of being brought into engagement with" the aperture 18% or to be disengaged therefrom. Sueh a'po'sition is an unusual, or abnormal one for the. link which is in any other position incapable of detachment from the extension 18 ofthe plate 15. this construction the hook-1% may be-gdetached from the plate 15 by swii'i'gingthe link; into the position above described and the pad12 may be removedand replaced another one,- whenever de'sirable;,and for-any reason as, for example, when the pad 12 becomes old orlworn out. I v .1 c -As shown inthe drawings, both of said hooks 19 19 lieeon the same siderof the shank 101% the link and in the sameiplane with each'other' so that the shank. will lie in contact witlrthesurface-ofthetire. v i 1 The construction described forms; a simple', economical andefficient means for; attaching the ends of thexpads ito theichai'ns, by whichjthe padslare held onthe tire. ,Ellhe lower plate 15 and the 1115p81'apla12 B.-17

friction-ally engage theitop sand" bottom-usurfaces of the padJend by reason ofltheadownwardly:b'ent: upper marginalxiparts 163?, 16 of the lateral flanges 16, 16, and as shown in tion between the upper plate and the pad- =end when the sallleis clamped thereto, the

pad surface being upset "into said groove under the pressure employed in permanently attaching the parts together.

In Fig 4L1 have; shown a novel form (if pad for use in an anti-skidding device of the kind herein referredto, ilnsaid figure, 20 indicatesthepad which began intermediate tread part2l and end parts 2 2, 22, extended beyond said tread part. The s aid end parts are like those, hereinbefore, described and are adaptedrlto-ihave appl d to than the sam kind 1 of attaching devices, although said paid may,,.be used WithotherkindS of attachinghrleviees, The intermediate tread part, 21 v ,o1. .th e pad is narrow at the middle and is wider at each side of the middle-adja- .flllhetread 21 oi the pad haswide y sha ped notches 22 .3, 21*, formed in each lateral margin with the apex of each notch in the trans ver emedian in qfzt e We ai fii e parthas edges, 21 2111, at each endfwhich are inclined toward mamher so] thatthe ends of the tread part are i V shaped, The end p r w he pa orm ex e s e p the, tread part of n the ;pad and negotiated j iiio ios

of the'general typeoii described in'L'et- L Dufly, Au s "17 h, l Q9,- a fi particular mntag tha vo ly W0. bitter/1h ti g d i s are req im olteenr e pad to the assembled,antirskidding device, whereas, the pad of said Dufly patent req iresf r- I I la m th i vent o .1 An attaching devio for liaving an, enchpart provided with longitudinallyi' pa ed pai s t. e 1; r1 .1y. 'pps notches in its lateral edges, said device co p is n i e low Plate a -a i SPQCt/lVQlX agalnstv the ,top and hottom surfaces of the end part of the, pad, one, of's'aid 1 plates having; i p ri h rll telr :I' e L'eS w-gag ng the lateral edges ot said end of the pad and extending at their ends; into said notches, said flanges having marginalparts turned down and clamped against the other plate and means for attaching a linK to one of said plates.

2. An attaching device for a pad, said pad having an end part provided with longitudinally spaced pairs of oppositely disposed notches in its lateral edges, said device comprising upper and lower plates engaging respectively against the top and bottom surfaces of the end part of the pad, one of said plates having upright lateral flanges engaging the lateral edges of said end part and extending at their ends into said notches, said flange having marginal parts turned down and clamped against the other plate, and one of said plates having an apertured extension.

3. An attaching device for a pad, said pad having an end part provided with longitudinally spaced pairs of oppositely disposed notches in its lateral edges which are arcuate between said notches, said device comprising upper and lower annular plates engaging respectively against the top and bottom surfaces of the end part of said pad, the bottom plate having upright lateral flanges engaging the arcuate edges of said end part and extending at their ends into said notches, said flanges having their upper marginal parts turned down on and clamped against the top plate and the lower plate having an extension for the attachment of a link.

4. An attaching device for a pad, said pad having an end part provided with longitudinally spaced pairs of oppositely dis posed notches in its lateral edges which are arcuate intermediate said notches, said device comprising upper and lower annular plates engaging respectively against the top and bottom surfaces of the end part ofthe pad, the upper plate having an annular groove in its bottom face, the bottom plate having upright lateral flanges engaging the arcuate edges of said pad end part and extending at their ends into said notches, said flanges having their upper marginal parts turned down on and clamped against the top plate, and the lower plate having an extension for the attachment of a link.

In testimony that I claim the foregoing as the invention 1 affix my signature in the presence of two witnesses, this 2nd day of June A. D. 1914.

R. STUART ADAM, Administrator 0 George J. Adam, deceased.

Witnesses:

T. H, ALFREDS, KARL W. DALL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner otlatents,

Washington, D. C. 

